Artificial tooth-crown



(No-Model.) A. E. MATTESON.

ARTIFICIAL TOOTH GROWN.

No. 297.704. Patented Apr. 29, 1884.

INVENTOR 'flrikur Zififaheson L.' his ldzforneys' workingand'manui'acture.

5 ways.

I UNITED STATES PATENT ()rrrca.

ARTHUR E. MATTESON, OF CHICAGO, ILLINOIS.

ARTIFICIAL TOOTH-CROWN.

SPECIFICATION forming part of Letters Patent No. 297,704, dated April29, 1884.

Application filed September 17, 1883. (No model.)

To all whom it may concern.- Be it known that I, ARTHUR E. MATTESON,

of Chicago, in the county of Gookand State of.

Illinois,have invented a certain new and useful Improvement inArtificial Tooth-Crowns and Material Tbereior, of which the following isa specification.

My invention relates to artificial toothcrowns which are to be appliedto natural roots remaining in the mouth afterthe natural crowns havebeen removed.

The object of my invention, more particularly, is to improve artificialtooth-crowns such, for instance, as that patented to me June 26, 1883,as No. 280,052; but itwill be understood, of course, that myimprovements are applicable in the construction of other crowns thanthat described in my said patent- In my said patentI have described anartificial toothcrown having a metal shell or body portion struck up orotherwise formed into the desired shape. The crown shown in my saidpatent is provided with a porcelain front. In some instances, however-asfor back and side teeththe porcelain portion of the crown may be omittedas unnecessary. In my present improvement I construct the metal or shellportion of an artificial'tooth-crown of a compound plate or strip ofgold and platina. The con1- pound plate may be made by sweating,soldering, or otherwise'securing a plate of fine gold to a plate ofplatina, the compound plate being rolled to the required thicknesssaythirty to thirty-five standard plate gage; or the gold may be depositedon a platina plate or strip; or the two metals may be otherwise securedtogether in ways known in the art of metal The compound plate or stripof platina and gold may be struck up to form the crown, or the metalshell or metal portion thereof, by suitable dies-for instance, asdescribed and claimed in an application filed by me October 12, 1883; orit may be formed into the desired shape in other The platina side of thecompound plate should be the inner side orsurfacc of the hollow crown,and the gold side shouldbethe outer or external surface, for the sake ofappearance, and for other purposeswell understood by those skilled inthe art of dentistry. By the use of the compound metal I am enabled touse a very thin plate or shell,and still retain the requisite strength,which is very desirable in setting artificial crowns. Further,by makingthe platina side of the plate or shell the innerside thereofithe amalgamusually used in setting crowns may be employed without-dangerofamalgamation with the shell or plate, as would be the case were goldalone employedas the metal of theshell. The platina also enables me touse pure or fine gold to solder the parts of theshell or crown togetherwithout danger of fusing the shell,the meltingpoint of platina beingvery high.

In Figure 1 of the accompanying drawings I have shownan enlarged view ofa metal plate from which my improved crowns are constructed, a being thegold plate or side, and b the platina sideor plate thereof; and in Figs.2 and 3 I have shown, respectively, a sectional View of a root andcrown, the crown having the shell or body portion made up of my compoundplate and a porcelain front, as in my aforesaid patent, and a view inelevatiouofa completed crown of that description.

The amalgam filling and retaining post or screw usually employed aredesignated, respectively, by c and d in Fig. 2.

Of course my improvements may be used with other forms of crownsthanthat paricu- 8c larly patented by me, as above recited.

I claim herein as my invention- An artificial tooth crown or shell, orportion thereof, constructed of a compound plate of gold and'platina,substantially as described.

In testimony whereof I have hereunto sub-. scribed my name this 14th dayof September, A. D. 1883. y

ARTHUR E. MATTESON.

Witnesses:

ISRAEL HOLMEs, M. BYRON RIoH.

